Best time to go to Thousand Islands
The best time to visit Thousand Islands depends on your weather preferences. The hottest average temperature around Thousand Islands is in July, when weather is mostly sunny and rainfall is light rain. The coolest average temperature around Thousand Islands is in January when weather is mostly cloudy and rainfall is light rain.
 Calendar Month |  Temperature |  Precipitation |  Cloudiness |
| January | 21.2°F (-6.0°C) | Light Rain | Mostly Cloudy |
| February | 22.3°F (-5.4°C) | Light Rain | Mostly Cloudy |
| March | 31.1°F (-0.5°C) | Light Rain | Mostly Cloudy |
| April | 42.8°F (6.0°C) | Light Rain | Mostly Cloudy |
| May | 55.2°F (12.9°C) | Light Rain | Mostly Sunny |
| June | 63.5°F (17.5°C) | Light Rain | Mostly Sunny |
| July | 70.0°F (21.1°C) | Light Rain | Mostly Sunny |
| August | 68.9°F (20.5°C) | Light Rain | Mostly Sunny |
| September | 62.2°F (16.8°C) | Light Rain | Mostly Sunny |
| October | 51.1°F (10.6°C) | Light Rain | Mostly Cloudy |
| November | 39.0°F (3.9°C) | Light Rain | Mostly Cloudy |
| December | 29.7°F (-1.3°C) | Light Rain | Mostly Cloudy |
